Spiral reinforcement of round column, pitch/spacing

[Engingguy]

I am designing a reinforced concrete column, 24" diameter, with 1.5" cover. f'c = 3000 psi, fyt=60,000 psi.I find the minimum volumetric reinforcement ratio to be 0.069. By ACI-318, looks like I can choose from #3,4,or 5 bar for the spiral. With the diameter of the core as it is (21"), I get a very small clear distance, less than the minimum 1". Where have I gone astray?
Thanks in advance.

 

[JAE]

I got 0.0069.

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[Engingguy]

Oh bloody hell, it is .0069! Works out to a #3 rebar at pitch of 3.03 and clear distance of 2.655 in. Thanks.[pre][/pre]